. >> shepard: cnn was working their network over there, and china blocked the cnn report, and the question is, have they gone after any government reporters? >> reporter: yes, they have, universities, and major media companies, and they have apparently done this for many years, and the goal here is always the same. to find out who is spreading information about the chinese government and the chinese government leaders, because the chinese government likes to remain control. >> we have to remember that beijing runs the most sophisticated set of controls in the world. if they want to, they can know what happens on any keyboard inside of china. so if the cyber attack comes from inside of china, the chinese leaders are behind it or complicent. >> reporter: of course, the chinese government has denied all of the allegations. >> shepard: they have, and officials evacuated a delta airlines flight today. a bit of a brake problem. it happened at boston, logan. they grounded a plane just before take off. and they grounded the jet right beneath it's back end. the aircraft had issue with one of its wh